Method of load and speed modifying on fuel lean-out for internal combustion engines

Claim 1

A method of load and speed modifying on declaration fuel lean-out for an internal combustion engine, said method comprising the steps of: determining if conditions are right for executing said method and continuing said method if the conditions are right; sensing a speed of the engine; determining an engine speed modifier as a function of current sensed engine speed; sensing a manifold absolute pressure (MAP) of an intake manifold of the engine; determining an engine load modifier as a function of current sensed MAP; adding the determined engine speed modifier and engine load modifier together to yield a speed/load modifier; and applying the speed/load modifier value to a fuel pulsewidth value of fuel injectors for the engine and reducing the amount of fuel injected into the engine by the fuel injectors.

Claim 2

A method of load and speed modifying on declaration fuel lean-out for an internal combustion engine, said method comprising the steps of: determining if conditions are right for executing said method and continuing said method if the conditions are right; sensing a speed of the engine; determining an engine speed modifier as a function of current sensed engine speed; sensing a manifold absolute pressure (MAP) of an intake manifold of the engine; determining an engine load modifier as a function of current sensed MAP; adding the determined engine speed modifier and engine load modifier together to yield a speed/load modifier; and applying the speed/load modifier value to a fuel pulsewidth value of fuel injectors for the engine and reducing the amount of fuel injected into the engine by the fuel injectors.

Claim 3

A method of load and speed modifying on fuel lean-out for an internal combustion engine, said method comprising the steps of: sensing a speed of the engine; determining an engine speed modifier as a function of current sensed engine speed; sensing a manifold absolute pressure (MAP) of an intake manifold of the engine; determining an engine load modifier as a function of current sensed MAP; adding the determined engine speed modifier and engine load modifier together to yield a speed/load modifier; and determining whether a throttle lean-out multiplier value is greater than or equal to a MAP lean-out multiplier; and applying the speed/load modifier value to a fuel pulsewidth value of fuel injectors for the engine and reducing the amount of fuel injected into the engine by the fuel injectors.

Claim 4

A method of load and speed modifying on fuel lean-out for an internal combustion engine, said method comprising the steps of: sensing a speed of the engine; determining an engine speed modifier as a function of current sensed engine speed; sensing a manifold absolute pressure (MAP) of an intake manifold of the engine; determining an engine load modifier as a function of current sensed MAP; adding the determined engine speed modifier and engine load modifier together to yield a speed/load modifier; and determining whether a throttle lean-out multiplier value is greater than or equal to a MAP lean-out multiplier; and applying the speed/load modifier value to a fuel pulsewidth value of fuel injectors for the engine and reducing the amount of fuel injected into the engine by the fuel injectors.

Claim 8

A method of load and speed modifying on fuel lean-out for an internal combustion engine, said method comprising the steps of: sensing a speed of the engine; determining an engine speed modifier as a function of current sensed engine speed; sensing a manifold absolute pressure (MAP) of an intake manifold of the engine; determining an engine load modifier as a function of current sensed MAP; adding the determined engine speed modifier and engine load modifier together to yield a speed/load modifier; determining whether a throttle lean-out multiplier value is greater than or equal to a MAP lean-out multiplier; applying the speed/load modifier to the throttle lean-out multiplier value if the throttle lean-out multiplier value is greater than or equal to the MAP lean-out multiplier value; applying the speed/load modifier to the MAP lean-out multiplier value if the throttle lean-out multiplier value is not greater than or equal to the MAP lean-out multiplier value; calculating a final proportional deceleration fuel lean-out multiplier based on the throttle lean-out multiplier and MAP lean-out multiplier values; and applying the calculated final proportional deceleration fuel lean-out multiplier value to a fuel pulsewidth value of fuel injectors for the engine and reducing the amount of fuel injected into the engine by the fuel injectors.

Claim 9

A method of load and speed modifying on fuel lean-out for an internal combustion engine, said method comprising the steps of: sensing a speed of the engine; determining an engine speed modifier as a function of current sensed engine speed; sensing a manifold absolute pressure (MAP) of an intake manifold of the engine; determining an engine load modifier as a function of current sensed MAP; adding the determined engine speed modifier and engine load modifier together to yield a speed/load modifier; determining whether a throttle lean-out multiplier value is greater than or equal to a MAP lean-out multiplier; applying the speed/load modifier to the throttle lean-out multiplier value if the throttle lean-out multiplier value is greater than or equal to the MAP lean-out multiplier value; applying the speed/load modifier to the MAP lean-out multiplier value if the throttle lean-out multiplier value is not greater than or equal to the MAP lean-out multiplier value; calculating a final proportional deceleration fuel lean-out multiplier based on the throttle lean-out multiplier and MAP lean-out multiplier values; and applying the calculated final proportional deceleration fuel lean-out multiplier value to a fuel pulsewidth value of fuel injectors for the engine and reducing the amount of fuel injected into the engine by the fuel injectors.